Stimulus representation in human frontal cortex supports flexible control in working memory DOI Creative Commons
Zhujun Shao, Mengya Zhang, Qing Yu

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown

Published: July 29, 2023

Abstract When holding visual information temporarily in working memory (WM), the neural representation of memorandum is distributed across various cortical regions, including and frontal cortices. However, role stimulus cortices during WM has been controversial. Here we tested hypothesis that persists cortex to facilitate flexible control demands WM. During functional MRI, participants flexibly switched between simple maintenance or more complex rule-based categorization maintained on a trial-by-trial basis. Our results demonstrated enhanced tracked for active precise maintenance. This differential traded off with newly-generated category varying demands. Simulation using multi-module recurrent networks replicated human patterns when was preserved network readout. Altogether, these findings help reconcile long-standing debate research, provide empirical computational evidence serves as potential coding scheme accommodate ever-changing environment.

Language: Английский

Decoding the rhythmic representation and communication of visual contents DOI Creative Commons
Rico Stecher, Radoslaw M. Cichy, Daniel Kaiser

et al.

Trends in Neurosciences, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

Citations

1
Distinct neural signatures underlying information maintenance and manipulation in working memory DOI
Dongping Shi, Qing Yu

Cerebral Cortex, Journal Year: 2024, Volume and Issue: 34(3)

Published: March 1, 2024

Abstract Previous working memory research has demonstrated robust stimulus representations during maintenance in both voltage and alpha-band activity electroencephalography. However, the exact functions of these 2 neural signatures have remained controversial. Here we systematically investigated their respective contributions to manipulation. Human participants either maintained a previously seen spatial location, or manipulated location following mental rotation cue over delay. Using multivariate decoding, observed low-frequency oscillatory with distinct spatiotemporal dynamics: were most evident posterior channels activity, but prominent more anterior, central signals. Moreover, temporal emergence representation preceded that suggesting might carry stimulus-specific source signals originated internally from anterior cortex, whereas reflect feedback cortex received higher-order cortex. Lastly, while coded low-dimensional subspace, was higher-dimensional underwent representational transformation exclusively predicted behavior. Together, results highlight crucial role memory, support functional distinctions between activity.

Language: Английский

Citations

8
Multi-scale spatiotemporal attention network for neuron based motor imagery EEG classification DOI
Venkata Chunduri, Yassine Aoudni, Samiullah Khan

et al.

Journal of Neuroscience Methods, Journal Year: 2024, Volume and Issue: 406, P. 110128 - 110128

Published: March 28, 2024

Language: Английский

Citations

6
Alpha-frequency feedback to early visual cortex orchestrates coherent naturalistic vision DOI Creative Commons
Lixiang Chen, Radoslaw M. Cichy, Daniel Kaiser

et al.

Science Advances, Journal Year: 2023, Volume and Issue: 9(45)

Published: Nov. 10, 2023

During naturalistic vision, the brain generates coherent percepts by integrating sensory inputs scattered across visual field. Here, we asked whether this integration process is mediated rhythmic cortical feedback. In electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) experiments, experimentally manipulated integrative processing changing spatiotemporal coherence of videos presented hemifields. Our EEG data revealed that information about incoherent coded in feedforward-related gamma activity while feedback-related alpha activity, indicating indeed activity. fMRI identified scene-selective cortex human middle temporal complex (hMT) as likely sources Analytically combining our further representations band shape earliest stages cortex. Together, findings indicate construction experiences relies on feedback rhythms fully traverse hierarchy.

Language: Английский

Citations

16
Psychophysiological strategies for enhancing performance through imagery–skin conductance level analysis in guided vs. self-produced imagery DOI Creative Commons
Dagmara Budnik–Przybylska, Paweł Syty, Maria Kaźmierczak

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: March 2, 2024

Abstract Athletes need to achieve their optimal level of arousal for peak performance. Visualization or mental rehearsal (i.e., Imagery) often helps obtain an appropriate activation, which can be detected by monitoring Skin Conductance Level (SCL). However, different types imagery could elicit amount physiological arousal. Therefore, this study aims: (1) investigate differences in SCL associated with two instructional modalities (guided vs. self-produced) and six scripts; (2) check if differentiate respondents according sport expertise. Thirty participants, aged between 14 42 years ( M = 22.93; SD 5.24), levels took part the study. Participants listened each previously recorded script then were asked imagine scene a minute. During task, was monitored. We analysed mean value, variance, slope number fluctuations per minute electrodermal signal. Unsupervised machine learning models used measuring resemblance The Wilcoxon signed-rank test distinguishing guided self-produced imagery, Mann–Whitney U results athletes. discovered that among others, generates lower SCL, higher compared imagery. Moreover, we found similarities signal groups athletes (i.e. expertise level). From practical point view, our findings suggest implemented specific purposes preparation.

Language: Английский

Citations

5
Stimulus representation in human frontal cortex supports flexible control in working memory DOI Open Access
Zhujun Shao, Mengya Zhang, Qing Yu

et al.

Published: March 14, 2025

When holding visual information temporarily in working memory (WM), the neural representation of memorandum is distributed across various cortical regions, including and frontal cortices. However, role stimulus cortices during WM has been controversial. Here we tested hypothesis that persists cortex to facilitate flexible control demands WM. During functional MRI, participants flexibly switched between simple maintenance or more complex rule-based categorization maintained on a trial-by-trial basis. Our results demonstrated enhanced tracked for active precise maintenance. This differential traded off with newly-generated category varying demands. Simulation using multi-module recurrent networks replicated human patterns when was preserved network readout. Altogether, these findings help reconcile long-standing debate research, provide empirical computational evidence serves as potential coding scheme accommodate ever-changing environment.

Language: Английский

Citations

0
Stimulus representation in human frontal cortex supports flexible control in working memory DOI Creative Commons
Zhujun Shao, Mengya Zhang, Qing Yu

et al.

eLife, Journal Year: 2025, Volume and Issue: 13

Published: April 24, 2025

When holding visual information temporarily in working memory (WM), the neural representation of memorandum is distributed across various cortical regions, including and frontal cortices. However, role stimulus cortices during WM has been controversial. Here, we tested hypothesis that persists cortex to facilitate flexible control demands WM. During functional MRI, participants flexibly switched between simple maintenance or more complex rule-based categorization maintained on a trial-by-trial basis. Our results demonstrated enhanced tracked for active precise maintenance. This differential traded off with newly-generated category varying demands. Simulation using multi-module recurrent networks replicated human patterns when was preserved network readout. Altogether, these findings help reconcile long-standing debate research, provide empirical computational evidence serves as potential coding scheme accommodate ever-changing environment.

Language: Английский

Citations

0
Stimulus representation in human frontal cortex supports flexible control in working memory DOI Open Access
Zhujun Shao, Mengya Zhang, Qing Yu

et al.

Published: Jan. 7, 2025

When holding visual information temporarily in working memory (WM), the neural representation of memorandum is distributed across various cortical regions, including and frontal cortices. However, role stimulus cortices during WM has been controversial. Here we tested hypothesis that persists cortex to facilitate flexible control demands WM. During functional MRI, participants flexibly switched between simple maintenance or more complex rule-based categorization maintained on a trial-by-trial basis. Our results demonstrated enhanced tracked for active precise maintenance. This differential traded off with newly-generated category varying demands. Simulation using multi-module recurrent networks replicated human patterns when was preserved network readout. Altogether, these findings help reconcile long-standing debate research, provide empirical computational evidence serves as potential coding scheme accommodate ever-changing environment.

Language: Английский

Citations

0
Covariance-based decoding reveals a category-specific functional connectivity network for imagined visual objects DOI Creative Commons

Francesco Mantegna,

Emanuele Olivetti, Philipp Schwedhelm

et al.

NeuroImage, Journal Year: 2025, Volume and Issue: unknown, P. 121171 - 121171

Published: March 1, 2025

The coordination of different brain regions is required for the visual imagery complex objects (e.g., faces and places). Short-range connectivity within sensory areas necessary to construct mental image. Long-range between control re-instantiate maintain While dynamic changes in functional are expected during imagery, it unclear whether a category-specific network exists which strength spatial destination connections vary depending on target. In this magnetoencephalography study, we used minimally constrained experimental paradigm wherein categories were prompted using word cues only, decoded face versus place based their underlying patterns as estimated from covariance across regions. A subnetwork analysis further disentangled contribution connections. results show that can be both short-range long-range Overall, imagined object distinguished observed network. Notably, estimates rely purely endogenous signals suggesting an external reference not elicit such dynamics.

Language: Английский

Citations

0
Attentional guidance through object associations in visual cortex DOI Creative Commons
Maëlle Lerebourg, Floris P. de Lange, Marius V. Peelen

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 4, 2024

Abstract Efficient behavior requires the rapid attentional selection of task-relevant objects. Preparatory activity target-selective neurons in visual cortex is thought to support selection, guiding spatial attention and favoring processing target-matching input. However, naturalistic searches are often guided by non-targets, including target-associated “anchor” For instance, when looking for a pen, we may direct our office desk on which expect find it. Here, using fMRI eyetracking context-guided search task, tested whether preparatory reflected target, anchor object, or both. Participants learned associations between targets anchors, reversing across two scene contexts, before searching these targets. Participants’ first fixations were reliably associated anchor. lateral occipital (LOC), right intraparietal sulcus (IPS), represented rather than target. These results shed light neural basis structured environments.

Language: Английский

Citations

2